#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
const int mod = 1e9 + 7;

int gcd(int a, int b)
{
    return b ? gcd(b, a % b) : a;
}

ll qmi(ll a, ll b)
{
    ll res = 1;
    while(b)
    {
        if(b & 1)res = res * a % mod;
        b >>= 1;
        a = a * a % mod;
    }
    return res;
}
struct custom_hash {
	static uint64_t splitmix64(uint64_t x) {
		x ^= x << 13;
		x ^= x >> 7;
		x ^= x << 17;
		return x; 
	}
	size_t operator () (uint64_t x) const {
		static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); // 时间戳
		return splitmix64(x + FIXED_RANDOM);
	}
};

void solve()
{
    int n;
    cin >> n;
    int a = min(n - 2, 26);
    n -= a;
    int b = min(n - 1, 26);
    n -= b;
    string s;
    s += (n + 'a' - 1);
    s += (b + 'a' - 1); 
    s += (a + 'a' - 1);
    cout << s << endl;
}

int main()
{
    int t;
    cin >> t;
    while(t--) solve();
    return 0;
}